The norms peters co



(No Model.)

0. J. MICHAELS & G. BAEDER.

GLASS CUTTING MACHINE. No. 427,002. Patented Apr 29, 1890.

803 mm? wiwxwhw.

UNITED STATES OLIVER J. MICI'IAELS AND CHARLES BAEDER, OF PITTSBURG,PENNSYL- VANIA, ASSIGNORS OF ONE-THIRD TO EDXVARD ROBERTS, OF SAMEPLACE.

GLASS-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 427,002, dated April29, 1890.

Application filed October 24, 1889. Serial No. 328,050. (No model.

To all whom it may concern.-

' Be it known that we, OLIVER J. MICHAELS and CHARLES BAEDER, citizensof the United States, residing at Pittsburg, in the county of Alleghenyand State of Pennsylvania, have invented certain new and usefulImprovements in Glass-Cutting Machines; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

Our invention relates to an improvement in glass-cutters; and itconsists of a rotary cutting-disk having the convex surfaces whichconverge to form a sharp periphery, and pro- Vided in its periphery witha series. of incisions, and, further, in the peculiar construction andadaptation of parts, as will be hereinafter more fully described andclaimed.

In the accompanying drawings, Figure 1 is a plan view of our improvedglass-trimming machine constructed in accordance with our invention.Fig. 2 is an end elevation having a portion of the disk-broken away, thebetter to show the general construction of the machine.

To put our invention into practice we provide a frame A, of suitablesize and form of construction, and mount thereon, in suitable bearingsb, a stout shaft 0, to one end of which we attach, by means of ascrew-thread and nut d, aconvex steel disk or cutter c. This cutter e weform with a sharp periphery f, and protrimmed is held, either by hand ordevice,

against the cutter, which rapidly on ts through the glass.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is

1. In a machine for cutting glass, a cutterdisk having convex surfaceswhich converge to form the sharp periphery, and providedwith a series ofincisions in its periphery, substantially as and for the purposedescribed.

2. A machine for cutting glass having a rotary shaft, a cutter-diskrigidly fixed on the shaft and provided with the converging convexsurfaces and with a series of incisions in its periphery, and suitablemeans-for rotating the shaft and cutter at high speed, substantially asdescribed.

In testimony that we claim the foregoing we hereunto affix oursignatures this 5th day of November, A. D. 1888.

OLIVER J. MICHAELS. CHARLES BAEDER.

